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About NFRC

NFRC is a non-profit organization that administers the only uniform, independent rating and labeling system for the energy performance of windows, doors, skylights, and attachment products. Our goal is to provide fair, accurate, and reliable energy performance ratings so that:

•  Homeowners, architects, builders, code officials, contractors, and others can compare different products and make informed product choices.

•  Building officials, state government employees, and others involved in code development and enforcement can determine if products meet local codes.

•  Government- and utility-run energy efficiency programs can establish performance requirements and standards.

•  Manufacturers have a fair and level playing field to compare products and an accurate method of showing the energy benefits of new designs or technology.


NFRC develops and administers energy-related rating and certification programs that serve the public by providing fair, accurate, and credible information on fenestration performance.

Core Values

  • Commitment to the public interest by providing fair, accurate, and credible ratings
  • Consensus driven process -- Varied interests working together, crafting a balanced approach to our work
  • Respect all input from stakeholders
  • Protect and preserve the integrity of the NFRC and its programs and ratings


  • Deliver valid, usable data to all customers (the public/building industry/code officials/government)
  • Deliver a successful energy rating program to the commercial fenestration industry
  • Deliver an improved and simplified rating program for the residential fenestration industry

  • Deliver new rating procedures and programs for existing and emerging technologies 

The History of NFRC

The National Fenestration Rating Council (NFRC) was formed in response to the energy crises of the 1970s.

To address concerns about energy consumption, the fenestration industry developed a host of new energy efficient technologies, including low-e coatings, low-conductance spacers, and gas fills.

Unfortunately, in advertising these new technologies some manufacturers made outlandish claims about the performance of their products. Consumers complained, and the federal government began to investigate. 

By the late 1980s, industry stakeholders staved off confusion, federal intervention, and perhaps costly litigation by coming together in 1989 and founding NFRC to provide independent verification of product performance.

NFRC continues to be a relevant and needed resource -- both for the industry and the general public -- due to continuing energy concerns and energy-conservation trends.